well last time I was sick sick I was in boarding school (last winter) and when one person in that school gets sick every one will, so I went HARD I ate my fill at each meal and puked it that night yelling "WEEEEW!" in between vomits....
I am happy, I have a great immune system, I usually only get really sick (vomiting or bed ridden) like once a year other than that I get mild head colds.